Whistle



Patented Sept. 15, 1925.

FRANK IARIZEK, or CHICAGO, ILLINOIS.

WHISTLE;

Application filed November 1, 192.4. Serial No. 747,236.

To all whomz't vmay concern: v

Be it known that I, FRANK PARIZEK, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Whistles, of'which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to whistles, and more particualrly to exhaust whistles.

The purpose of my invention is to'provide t y whistle comprises a bodyportionV 10`hav1n'g a whistle of the above mentioned character that comprises a one piece body portion and an outer shell mounted thereon, said outer shell being preferably shrunk on the body portion.

It is a further purpose of the invention, to provide a whistle ofthe above mentioned character in which the body portion is made in one piece and preferably of a metal that expands more rapidly than the met-al of the outer shell so that upon heating of fthe whistle due to the exhaust gases passing through the same, the outer shell Awill be held more firmly in position thehotter the parts of the whistle get. ably made of an aluminum casting comprising longitudinally extending Wall portions, transverse partitions and end wall portions, the body portion having a chamber at Vone vend thereof into which a connectionV from the exhaust pipe enters, and an outer shell of brass, the brass having a lower coeflicient of expansion than the aluminum, thus providing for a tight joint between theA shell and the body portion as referred to above..

It is another purpose of the invention to provide orifices leading from the chamber in one end of the casing to the passages delined by the longitudinally extending walls of the body portion, said orifices being formed by means of elongated recesses in the end'vvall at one end of the chamber and slots in thev side wall portion of the chamber, said slots being relatively wide to prevent clogging thereof. f

Other objects and advantages of the invention will appear as the description of the accompanying drawings proceeds. However, I desire to have it distinctly under-I stood that I do not intend to limit myself to the exact details shown or described, but that I intend to include as part of my invention all such obvious changes and modi- Y y of Fig. 1.v

The whistle is prefer fications'of parts as would occur to a person skilled in this art and as would fall within the scope of the claims.

In the drawings:

Fig. 1 is a side elevationof my improvedV whistle; y

Figj2 is a similarview partly broken awayof the body portion thereof; 1

Fig. 3 is a section taken on the line 33 of Fig. 1; and v Fig. 4 isa section taken on the line 4.-4

Referring in detail to the/drawings, the

a plurality of longitudinally extending walls 11, 12, 13, and 11i, said Walls preferablyex tending radially from the central port-ion 15 One end of the body' portion" is provided with an internally screw threaded lprojection' 20 that is preferably made with flat faces so as to provide means for turning the whistle on to the screw threaded end of the pipe by a wrench or similar tool. The end of y the body portion having the screw threaded member 20 thereon has aside Wall portion 21 and an end wall portion 22 de-l nning a chamber 23. The side wall 21 is lprovided .with a plurality of elongated Wide slots 24E and the end wall portion 22 has a correspondingv groove or recess 25 therein,

thus providing elongated angularv passages between the outer shell 26 and the body portion 1() leading from the chamber 23 outwardly through the arcuate spaces provided between the thin portions 27 of the side wall 21 and the grooves 25 in the end Wall 22.

The shell 26 is in the form of a circular band which is a short section of a tube andV which fits snugly on the'curved wall portion 28 of the member 10v at one end thereof as is clearly shownY in Fig. 1. f y

The body portion is further provided with an end Wall portion 29 at the opposite end thereofV which has a curved edge portion which is of substantially'` the same diameter as the curved wall portion 28. Certain of said longitudinally extending walls are probular casing on shell` 34 is provided on the body portion 10 and nts snugly on the edges of the longitudinally extending members 11, 12, 13, and 14 and the'end portion 29. It will be seen that due to the provision of the openings 30, certain of the longitudinally extending passages are increased yin their effective length due to the addition of the portion of the adjoining longitudinal passage way between the partition and the end ywall thereto. As for example, in Fig. 2, thel portion 35 between the end wall 29 and the partition 32 is added to the length of the passage 19 provided between the walls 11 and 14 and in a similar manner the portion 36 between the partition 33 and the end wall 29 is added to the length of the passage 17. Thus, the passage 16 is' the shortest, the passage 18 is next in length, the passage 17 is still longer and the passage 19 is the longest.

The tubular member 34 is spaced from the tubular member 26y to provide an opening 37 therebetween, thereby providing an opening in the bottom of each column ofv air or pipe in the whistle. The member 10 comprising t-helongitudinal wallsill, 12, 13 and 14, the end portion forming the chamber 23 and the end wall 29 as Well as the partitions 32 and 33 is cast in one piece preferably of aluminurn. The tubularymemblers 26 and 34 forming the shell are preferably made of brass tubing. rlhe members 28 and S4 are preferably shrunk on the member 10 anddue to the fact that the material of the member 10 if has a higher coeflicient of expansion than the shell made up of the members 26 and 34, the heating up of the whistle in use due to the passage of the exahust gases therethrough will cause a more rapid expansion of the aluminum body portion than the brass tubing and as a result will liold the parts in position with an increasing pressure as the device heats up.

Having thus described my invention, what I desire to claim and secure by United States Letters Patent is; e j

1. A whistle of the character described comprising abody portion having a plurality of substantially radially extending walls, end walls integral therewith, a plurality of transverse partitions and aV tubular shell shrunk on said body portion to provideV a plurality of longitudinally extending chambers therein, certain of said radial walls being interrupted on one sideof said p'arti' tions, whereby certain of said chambers have portions lying endwise beyond an adjoining chamberp j y Y 2. A whistle. of the character described comprising a body portion having a.` plu` rality of longitudinally extending walls, end walls, transversely extending partitions on said body portion and a casing surrounding 3. A whistle of the character described comprising a body portion having a plurality of substantially radially extending` walls, en d walls integral therewith, a tuf bular shell surrounding said body portion to provide a plurality of longitudinally extending chambers therein, a chamber in one end of said body portion and orifices leading into said longitudinally extending chambers from said end chamber certain of said radial walls being interrupted, whereby the portion of said longitudinal chamber on one side of the partitions adjacent thereto serves as an extension of the adjoining longitudinal chamber.

4. A whistle of the character .described comprising-'an outer shell and an inner body portion closely engaging' said shell, said body portion being of material having a. greater co-eflficient of expansion than said shell whereby heating of said whistle tightens said shell on said body portion.` j

5. A whistle of the character described lcomprising an outer shell and an inner body portion shrunk on said shell, said body portion being ofmaterial having a. greater coeilicient of eXpansion than said shell whereby heating of said j whistle tightens said shell on said body portion.` p

6. A whistle of the character described comprising airouter shell and an inner body portion having longitudinal walls, end walls and Itransverse partitions integral therewith closely engaging said shell, said body portion being of inaterial having a greater co-eiiicient of expansion than said shell whereby heating of ,said whistle tightens said shell on said body portion.

7 A whistle of the character described comprising an inner aluminum body portion and outer brass shell shrunk thereon.

8. Awhistl'e of the character described comprising a body portion having a cham ber in one end thereof, a plurality of longitudinally extending walls defining passages therebetween extending from one end wall of said. chamber, said end wall having recesses therein and the side wall portion of said chamber having wide slots thereinleadl ing to said recesses, and an outer shell surrounding said body portion.

v In witness whereonl hereunto subscribe my vname this 23rd day of October, A. D. 1924.

FRANK PARIZEK. 

